JPH11348098A - Lamp unit for vehicle and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lamp unit for a vehicle for preventing occurrence of brightness and darkness of an illuminated light from a lens surface by making a thickness of a lamp case or particularly a thickness of a lens portion uniform, and a method for manufacturing the lamp unit. SOLUTION: In the lamp unit 10 for a vehicle obtained by integrally molding a lens portion 12 and a housing portion 13 by blow molding, a parting line L at the time of blow molding has a parting line L1 of the lens portion side formed substantially parallel to a lens surface 12a at a front end of the lens portion 12 and a parting line L2 of the housing portion side formed at a position for substantially splitting the housing portion 13 through a lamp component holding portion 14 of the housing portion 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicular lamp device and a method of manufacturing the same, and more particularly, to a vehicular lamp device in which a lens portion and a housing portion of a lamp case are integrally formed and a method of manufacturing the same.

[0002]

2. Description of the Related Art Various types of vehicle lamp devices, such as license plate lamps, side lamps, and turn signal lamps, are mounted on automobiles. The vehicle lamp device includes a lamp case having a lens portion and a housing portion, and a lamp component having a lamp attached to a socket.

[0003] In recent years, as the vehicle lamp device, FIGS.
A lamp device 120 for a vehicle in which a lens portion 122 and a housing portion 123 of a lamp case 121 as shown in FIG. In the drawing, reference numeral 131 denotes a lamp component, 132 denotes a socket, 13
3 is a lamp.

In the vehicle lamp device 120,
A lamp component mounting opening 125 is formed in the bulged central portion (lamp component holding portion) 124 of the housing portion 123, and a groove 132 a on the outer peripheral surface of the socket 132 is fitted around the mounting opening 125. A lamp component 131 is housed and held in the lamp case 121. Note that reference numeral 134 denotes a rubber packing for ensuring the sealing property between the lamp case 121 and the lamp component 131.

Incidentally, the parting line at the time of blow molding of the lamp case 121, that is, the parting line W generated at the part where the parison contacts the parting surface (partition surface) of the blow mold, does not impair the appearance of the lamp case 121. It is often set around the housing part 123 at such an inconspicuous position so that the opening and closing of the blow mold is not hindered. In the related art, the parting line W connects the lamp case 121 to the lens unit 122.
As shown in FIG. 21, the lens surface 122a is substantially divided into a side portion and a housing portion 123 side portion.
The circumference x on the lens unit 122 side in front of the parting line W and the housing unit 1 on the rear side on a cross section orthogonal to
A configuration in which the circumference y on the 23 side is set to be substantially the same has been proposed. By setting the parting line W in this manner, the expansion of the lens-part-side expansion part and the expansion of the housing-part-side expansion part of the parison during blow molding (when the parison expands) are made substantially the same, and the lens part after molding is formed. The thickness of the side portion 122 and the thickness of the housing portion side 123 portion are about to be the same.

However, in the above-mentioned conventional structure, although the thickness deviation of the entire lamp case 121 is reduced,
Since the parting line W has a curved shape corresponding to the bulging shape of the lamp component holding portion 124 of the housing portion 123, the length distance x between each position of the lens surface 122a (the front surface of the lens) and the parting line W is small. It changes according to the curved shape of the parting line W. Accordingly, the expansion of the expanded portion of the parison at the lens portion side during blow molding differs at each position of the lens surface 122a, and a thickness deviation occurs in the lens portion 122, and the lens surface 122a There is a possibility that light and darkness (unevenness) may occur in the irradiation light passing through. Specifically, as shown in FIG. 20, the length x1 around the lens portion 122 side portion at the lens surface end position is smaller than the lens portion 12 at the lens surface center position.
The length x2 around the two-side portion becomes large, and as a result, FIG.
As shown in (2), the thickness z2 at the center portion of the lens surface becomes smaller than the thickness z1 at the end portion of the lens surface of the lens portion 122.

In the above-mentioned conventional structure, the lamp case 1
After the blow molding of 21, the lamp component mounting opening 125 for the lamp component 131 must be post-processed by an ultrasonic cutter or the like, and the lamp case is integrally formed by blow molding adopted for the purpose of reducing the number of steps. There is also a problem that the benefits diminish. Further, in the structure in which the lamp component 131 is mounted on the periphery of the lamp component mounting opening 125, the convenience of the lamp component 131 when replacing the lamp 133 (easiness of replacement) is advantageous, but the vehicular lamp device 120 is advantageous. Since the assembling work such as mounting the lamp parts 131 on the lamp case 121 is required at the time of manufacturing, the workability is poor, and the total manufacturing cost is increased, that is, the product price is increased and it is hard to say that it is advantageous for consumers. Was.

[0008]

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above points, and can make the thickness of a lamp case, particularly the thickness of a lens portion, uniform, and irradiate light from a lens surface. It is an object of the present invention to provide a vehicular lamp device and a method of manufacturing the same, which can prevent the occurrence of light and dark in the vehicle.

[0009]

According to a first aspect of the present invention, in a vehicle lamp device in which a lens portion and a housing portion are blow-molded integrally, a parting line at the time of blow molding is provided at a front end of the lens portion. A lens parting line formed substantially parallel to the lens surface, and a housing part parting line formed at a position where the housing part is substantially divided into two parts through the lamp component holding part of the housing part. The present invention relates to a vehicle lamp device.

According to a second aspect of the present invention, there is provided a method of manufacturing a vehicle lamp device in which a parison is disposed between blow molding dies and the lens is closed and the lens and the housing are integrally formed. A housing part formed by a housing part forming die and a lens part forming die divided by a lens part parting surface substantially parallel to the lens surface forming surface, and wherein the housing part forming die passes through the lamp part holding part forming part. A method for manufacturing a lamp device for a vehicle, comprising: being substantially divided into two parts by a side parting surface, closing and blowing the parison between the lens part side parting surface and the housing part side parting surface. Related.

Further, according to a third aspect of the present invention, in the second aspect, the protrusion for forming the opening is held in the molding part for the lamp component holding part of the housing part forming die and blow molded. The present invention relates to a method for manufacturing a lamp device for a vehicle, wherein an opening for mounting a lamp component is formed at a position of a protruding member.

According to a fourth aspect of the present invention, in the second aspect, the lamp component having the lamp attached to the socket is held by the lamp component holding portion forming portion of the housing portion forming die, and the lamp portion projects into the parison. The present invention relates to a method for manufacturing a vehicular lamp device, characterized by being blow molded.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the accompanying drawings. 1 is a perspective view showing a vehicle lamp device according to one embodiment of the present invention, FIG. 2 is a sectional view taken along line AA of FIG. 1, FIG. 3 is a sectional view taken along line BB of FIG. 1, and FIG. 5 is a cross-sectional view showing a parison arranged between blow molding dies when manufacturing the vehicle lamp device according to the present invention. FIG. 6 is a cross-sectional view taken along line DD in FIG. 7 is a cross-sectional view showing the initial stage of closing the blow mold, FIG. 8 is a cross-sectional view showing the same when the blow mold is closed, and FIG.
E is a cross-sectional view, FIG. 10 is a cross-sectional view showing the arrangement of the parison between the blow molds when manufacturing the vehicle lamp device according to the present invention according to another embodiment, and FIG. FIG. 12 is a cross-sectional view showing a state when the closing of the blow mold is completed, FIG. 13 is a cross-sectional view taken along line GG of FIG. 12, and FIG. 14 is a cross-sectional view showing an opening forming projection member used in the embodiment. FIG. 15 is a cross-sectional view showing a parison arranged between blow molds when manufacturing a vehicle lamp device according to the present invention according to still another embodiment. FIG. FIG. 17 is a sectional view showing FIG.
6 is a cross-sectional view taken along the line H-H, FIG. 18 is a cross-sectional view showing a main part of a blowing nozzle used in the embodiment, and FIG. 19 is a cross-sectional view of a parison in manufacturing a vehicle lamp device according to another embodiment of the present invention. It is sectional drawing which shows the time of arrangement | positioning between blow molding dies.

A vehicle lamp device 1 shown in FIGS.
Reference numeral 0 denotes an embodiment according to the first aspect of the present invention, in which a resin lamp case 11 in which a lens portion 12 and a housing portion 13 are integrally blow-molded, and a lamp 23 in a socket 22.
Is attached to the lamp component 21. The material of the lamp case 11 (parison) is preferably a transparent and hard methacrylic resin, polycarbonate, or the like.
The housing portion 13 is appropriately subjected to a known glittering process by silver paint application, aluminum evaporation, silver plating, or the like.

The lens portion 12 is formed in a transparent plate shape having a predetermined thickness on the front side of the lamp case 11, that is, on the portion on the illumination side. The outer surface of the front end of the lens portion 12 is a lens surface 12a. In this embodiment, the lens surface 12a has a substantially flat surface or a curved shape bulging slightly forward, and the outer shape (front shape) of the lens surface 12a is rectangular or square (rectangular in the drawing).

The housing part 13 forms the main body of the lamp case 11, and is mounted on the vehicle body and the lamp part 21.
Of the lens part 1
2 is formed in a curved shape so as to bulge out to the opposite side to cover the inner surface of the lens portion 12. The bulged central portion serves as a lamp component holding portion 14. The lamp component holding portion 14 has an opening 15 for mounting a lamp component. A groove 22a on the outer peripheral surface of the socket 22 of the lamp component 21 is formed around the opening 15. The lamp component 21 is housed and held in the lamp case 11 by being fitted. Reference numeral 24 in the drawing denotes a rubber packing for ensuring the sealing between the lamp case 11 and the lamp component 21. In addition, on the outer surface of the housing portion 13, hooks, clips, and the like (not shown) for attachment to the vehicle body are appropriately provided.

In the vehicle lamp device 10, a parting line (partition line) L at the time of blow molding is used.
Is composed of a lens part side parting line L1 and a housing part side parting line L2. The parting line L is located at a position that is inconspicuous so as not to impair the appearance of the molded product, and does not hinder the opening and closing of the blow mold, and furthermore, the lamp case 11 has a uniform thickness. Set as described.

The lens parting line L1
Is a lens surface 12 at a front end of the lens portion 12 along a boundary position 16 between the lens portion 12 and the housing portion 13.
It is formed substantially parallel to a. The lens part-side parting line L1 of this embodiment is substantially parallel to the lens surface shape in the vertical section passing through the center position of the lens surface 12a, that is, the AA section (the section along the long side direction T of the lens surface 12a). Parting lines L1a, L1b and parting lines L1b, L1b substantially parallel to the lens surface shape in a cross section passing through the center position of the lens surface, that is, a BB cross section (a cross section along the short side direction S of the lens surface 12). And is constituted by. On the other hand, the housing part-side parting line L2 is formed at a position where the housing part 13 is substantially divided into two through the lamp component holding part 14 of the housing part 13. The parting lines L1, L
The two become commingled with each other. In this embodiment, the housing part side parting line L2 is formed so as to divide the housing part 13 substantially in the short side direction S of the lens surface 12a.

With the above configuration, FIGS. 1 and 3
As shown in the figure, the length j along the surface of the lens portion 12 between the opposing parting lines L1a, L1a at the lens portion side parting line L1 is substantially constant at each position of the lens surface 12a. In the parison, the elongation of the lens portion forming portion (expanded portion on the lens portion side) of the parison becomes uniform, and the thickness deviation of the lens portion 12 can be prevented. The length of the lens surface between the other pair of opposing parting lines L1b, L1b is also substantially constant. Therefore, the lens unit 1 is different from the conventional one.
It is possible to prevent light and dark from being generated in the irradiation light from the lens surface 12a due to the thickness deviation of 2. Further, as shown in FIG. 4, a circumference k of the housing section 13 divided by the housing part side parting line L <b> 2.
Since the length k2 is substantially the same as 1 and the other peripheral length, the elongation of the housing portion to be formed (the expansion portion on the housing portion side) of the parison during blow molding becomes uniform, and the thickness deviation of the housing portion 13 occurs. Can be prevented. Therefore, when the lamp component mounting opening 15 is formed after blow molding, the thickness of the periphery of the lamp component mounting opening 15 can be made uniform, and the lamp case 11 and the lamp component 21 can be formed.
Can also have good fitting properties.

Next, an embodiment of a method for manufacturing a vehicle lamp device according to the second aspect of the present invention will be described with reference to an example of manufacturing the vehicle lamp device 10 shown in FIG. In this embodiment, a blow mold 30 as shown in FIGS.
Is used to blow-mold the lamp case 11.

The blow mold 30 includes a lens mold 31 and a housing mold 41 provided in a direction orthogonal to each other. The lens mold 31 and the housing mold 41 pass through the boundary between the lens mold 32 and the housing mold 42 and are substantially parallel to the lens surface molding surface 33 of the lens mold 31. It is divided by the lens part-side parting surfaces 35 and 45 so as to be openable and closable. In this embodiment, in order to correspond to the vehicle lamp device 10 shown in FIGS. 1 to 4, the lens part-side parting surface is substantially parallel to a longitudinal section and a transverse section passing through the center of the lens surface forming surface 33. 35 and 45 are formed. In this embodiment, the lens part forming die 31 is slidable with respect to the housing part forming die 41 by appropriate means so that both the molds 31, 41 can be opened and closed. The housing part forming die 41 is substantially divided into two parts at the housing part side surfaces 46, 46 passing through the lamp part holding part forming part 43, and is configured to be openable and closable.
In the blow mold 30 shown in the drawing, the molding part 32 for the lens part is constituted by the molding surface of the molding part 31 for the lens part, and the molding part 42 for the housing part is constituted by the molding surface of the molding part 41 for the housing part. It is, of course, not limited to this, and for example, the housing part forming part 42 may be constituted by a part of the lens part forming die 31 and the housing part forming die 41. You may do it.

In the manufacturing procedure of the lamp device 10 using the blow molding die 30, first, as shown in FIGS. 5 and 6, the lamp device 10 is made of a thermoplastic material which is extruded in a molten state from a die 50 such as an extruder. The parison P is arranged between the blow molds 30, that is, between the opened lens part molds 31 and the housing part molds 41,41.

As the parison P, a flat cross-sectional shape having a major axis in the direction along the mold opening and closing direction of the lens part forming die 31 and the housing part forming die 41 as in this embodiment, or an external part is used. It is preferable to use one having a diameter larger than the shortest distance between the lens surface forming surface 33 of the lens part forming die 31 and the housing part forming die 41 when the mold is closed. In this way, when the lens mold 31 and the housing mold 41 to be described later are closed, the parison P
Is easily sandwiched between the lens part-side parting surfaces 35 and 45, and the parison P can be closed and expanded while the parison P is in contact with the lens surface forming surface 33 and pressed. Surface molding surface 3
It is easy to uniformly regulate the elongation to the third side.

Next, as shown in FIG. 7, the housing molds 41 of the blow mold 30 are closed.
At this time, the housing part side parting surfaces 46 and 46
Between the parison P and the tube wall P on the side of the housing portion to be formed
a.

Next, as shown in FIG. 8 and FIG. 9 showing a cross section taken along the line EE of FIG. 8 (a surface cut along the parting surface on the housing part side), the lens part molding die 31 of the blow molding die 30 and the housing part While closing the mold 41,
The parison P is expanded by blowing compressed gas such as air into the parison P through a blowing nozzle (not shown), and the expansion causes the parison P to expand for the lens part forming part 32 and the housing part of the blow mold 30. It is shaped into the shape of the forming part 42 (molding die surface shape). When the mold is closed,
The tube walls Pb, Pb of the parison P on the lens portion forming portion side are sandwiched between the lens portion side parting surfaces 35 and 45. With this configuration, the expansion of the parison P on the side where the lens section is to be formed when the parison P is inflated is not affected by the expansion on the side where the housing section is to be formed, and the side where the lens section is to be formed is easily extended uniformly. . Preferably, the compressed gas is blown into the parison P, that is, while the parison P is inflated, the lens mold 3 is expanded.
1 and the housing part forming die 41 are closed. After the parison P is shaped, the parison P is cooled and fixed in shape to form the lamp case 11.

In the blow molding, since the length of the lens forming portion 32 in each section obtained by cutting the blow mold 30 in the direction perpendicular to the lens surface forming surface 33 is substantially constant, The elongation of the portion of the parison P that is to be molded to the lens portion forming portion 32 that expands toward the lens portion forming portion 32 becomes uniform, and it is possible to prevent the thickness deviation of the lens portion 12 after blow molding. In addition, one housing part forming part 42 on the same cross section (cross section cut parallel to the lens surface forming surface 33) of the blow mold 30.
Is substantially the same as the length of the other housing part forming part 42, that is, since the two divided housing part forming parts 42, 42 have a symmetrical relationship, the housing of the parison P during blow molding is formed. Part forming parts 42, 42
The elongation of the housing portion forming portion that expands to the side becomes uniform, and it is possible to prevent a thickness deviation from occurring in the housing portion 13 after blow molding.

As described above, by closing the lens mold 31 and the housing mold 41 while blowing the compressed gas into the parison P, the air between the blow mold 30 and the parison P can be closed. The parison P can be brought into close contact with the lens surface forming surface 33 of the lens portion forming die 31 while extruding the outside of the die. That is, the blow mold 30
Air is accumulated between the parison P and the parison P, and the staying air can prevent the adhesion between the parison P and the lens surface forming surface 33 from being hindered. As a result, the processing accuracy of the lens surface 12a after blow molding can be improved, and it is possible to more reliably prevent light and dark from irradiating from the lens surface 12a.

The molding conditions such as the heating temperature, the heating timing or the heating time of the blow mold 30 and the pressure of the compressed gas during the blow molding are appropriately determined in consideration of the softening temperature of the parison.

In this embodiment, after the blow molding, the blow molding die 30 is opened to remove the molded product, and then the lamp component mounting opening 15 is formed at a predetermined position of the housing portion 13 by an ultrasonic cutter or the like. And the opening 15
Grooves 22a on the outer peripheral surface of the socket 22 of the lamp component 21 on the peripheral edge
And the lamp part 21 is attached to the lamp case 11.
The vehicle lamp device 10 as shown in FIG. At the time of the blow molding, excess portions Pa and Pb sandwiched between the lens part side parting surfaces 35 and 45 and the housing part side parting surfaces 46 and 46 are cut off by appropriate means.

Next, an embodiment of a method for manufacturing a vehicle lamp device according to the third aspect of the present invention will be described. In the manufacturing method according to the third aspect of the present invention, the lamp case 6
The method is characterized in that the lamp component mounting openings 65 are simultaneously formed at the time of the blow molding. In this embodiment, the blow molding of the lamp case 61 is performed using a blow molding die 80 as shown in FIGS.

The structure of the blow mold 80 is described in FIG.
9 is substantially the same as the configuration of the blow mold 30 shown in FIG. That is, the blow mold 80 is divided by the lens part-side parting surfaces 85 and 95 which pass through the boundary between the lens part forming part 82 and the housing part forming part 92 and are substantially parallel to the lens surface forming surface 83. It comprises a lens part forming die 81 and a housing part forming die 91, and the housing part forming die 91 is formed by the lamp part holding part forming part 9.
The housing parting surfaces 96, 96 passing through 3 are substantially divided into two parts. In the blow mold 80, the housing part side parting surfaces 96, 96 are provided.
The recesses 97 for the blowing nozzle corresponding to the shape of the blowing nozzle 100 are formed in the molding part 9 for the lamp component holding part.
3 is formed.

In the manufacturing procedure of this embodiment, first,
As shown in FIG. 10, a parison P extruded in a molten state from a die 105 of an extruder or the like is arranged between the blow molding dies 80, and the projection forming member 102 for forming an opening is located in the parison P as an insert. In this embodiment, as can be better understood from FIG.
The blow nozzle 100 is disposed between the blow molds 80 from a direction opposite to the die 105 (downward in the figure), and the parison P is extruded from the die 105 until the protrusion 102 for forming an opening is covered. , The opening forming projection member 102 is
Placed in parison P between zero.

The blowing nozzle 100 is for blowing compressed gas into the parison P during blow molding.
Also called a mandrel. Further, as can be easily understood from FIG. 14, the opening forming projection 102 has a sectional shape corresponding to the groove 22a on the outer peripheral surface of the socket 22 of the lamp component 21 shown in FIGS. ing. Reference numeral 103 in the drawing denotes a gas supply pipe that penetrates the blowing nozzle 100 and protrudes from the tip to the outside (inside the parison).

Subsequently, as shown in FIG. 12 and FIG. 13 showing a cross section taken along the line GG (a surface cut along the parting surface on the housing part side), the manufacturing method using the blow mold 30 described above is performed in the same manner. The mold is closed by sandwiching the parison P tube walls Pa and Pb between the lens-parting surfaces 85 and 95 and the housing-parting surfaces 96 and 96 of the blow mold 80, and gas is supplied to the blowing nozzle 100. A compressed gas is blown into the parison P from the pipe 103 for blow molding. When the mold is closed, the protrusion 102 for forming an opening is connected to the housing part forming mold 91,
The projections 102 are held by the molding parts 93, 93 of the lamp component holding part 91 via the parison P so that the protruding member 102 projects into the parison P. At this time, the molding parts 93, 93 for the lamp part holding part of the parison P and the projection member 1 for forming the opening are formed.
02 is pressed by the mold clamping force at the time of closing the mold so as to follow the outer shape of the protruding member 102.

Thereafter, the parison P is cooled and fixed in shape, and the opening forming projection 102 is removed from the molded product. Thereby, the lamp case 61 in which the lamp mounting opening 65 is formed in the lamp component holding portion 64 of the housing portion 63 is obtained. In this embodiment, the protruding member 102 (blowing nozzle 100) is removed from the lamp case 61 after the molded product is released from the mold, and the lens part-side parting surfaces 85 and 95 are blow-molded.
The excess portions Pa and Pb sandwiched between the housing part side parting surfaces 96 and 96 are cut off by appropriate means. After the lamp case 61 is obtained, the groove 22 a on the outer peripheral surface of the socket 22 of the lamp component 21 is fitted around the periphery of the lamp mounting opening 65, and the lamp component 21 is housed and held in the lamp case 61. In the figure, reference numeral 62 denotes a lens portion, 62a denotes a lens surface, and M1 denotes a lamp case 61.
The parting line M2 on the lens part side also indicates the parting line on the housing part side.

When the lamp device for a vehicle is manufactured as described above, the same effects as those of the manufacturing method using the blow mold 30 can be obtained.
A complicated post-processing such as forming the lamp component mounting opening 65 for the lamp component 21 with the ultrasonic cutter or the like in the housing portion 63 becomes unnecessary, and the number of manufacturing steps can be reduced.

Next, an embodiment of a method for manufacturing a vehicle lamp device according to the present invention will be described. The manufacturing method according to the fourth aspect is characterized in that the lamp component 71 is integrated with the lamp case 61 during blow molding. In this embodiment, the blow molding of the lamp case 61 is performed by using a blow molding die 80 having the same configuration as that of the embodiment of the third aspect of the present invention.

In the manufacturing procedure of this embodiment, first,
As shown in FIG. 15, when the parison P is arranged between the blow molds 80, the lamp component 71 in which the lamp 73 is attached to the socket 72 is positioned as an insert in the parison P. In this embodiment, the lamp component 71 is detachably held at the end 107 of the blowing nozzle 106, and the blowing nozzle 106 is arranged between the blow molding die 80 from the opposite direction (the lower side in the figure) of the die 105 and Then, the parison P is pushed out of the die 105 until the lamp 73 portion of the lamp component 71 is covered, so that the lamp component 71 is disposed in the parison P between the blow molds 80. Of course, the lamp component 71
The arrangement of the blowing nozzle 100 in the parison P may be performed separately. As shown in FIG. 18, a lamp component mounting concave portion 108 is provided at an end 107 of the blowing nozzle 106 in this embodiment.
At 08, the lamp component 71 can be detachably held. Reference numeral 109 in FIG. 18 denotes a gas supply pipe of the blowing nozzle 106.

Subsequently, as shown in FIG. 16 and FIG. 17 showing a cross section taken along the line HH (a section cut along the parting surface on the housing side), blow molding is performed in the same manner as in the two embodiments described above. Blow molding is performed by closing the mold 80 and blowing compressed gas into the parison P. At this time, the lamp part 71 is held by the molding part 93 for the lamp part holding part of the housing part molding die 91, and the lamp 73 part of the lamp part 71 is projected into the parison P.
In this embodiment, the housing part forming dies 91 and 91 are arranged so that the vicinity of the boundary part 76 between the main body part 74 and the base part 75 of the lamp 73 is sandwiched by a part corresponding to the lamp part holding part forming part 93 of the parison P. Perform the closed mold of.

Thereafter, the parison P is cooled and fixed in shape to form a lamp case 61. At this time, the outer surface of the lamp component 71, in this embodiment, the outer surface of the socket 72 and the outer surface of the base 75 of the lamp 73 are adhered to the inner surface of the lamp component holding portion 64 of the housing portion 63, and the lamp component 71 is connected to the lamp case 61. An integrated vehicle lamp device 60 is obtained. The blow nozzle 106 is removed from the lamp component 71 after the molded product is released from the mold, and is sandwiched between the lens part-side parting surfaces 85 and 95 and the housing part-side parting surfaces 96 and 96 during blow molding. The surplus portions Pa and Pb are cut off by appropriate means. In FIG. 16, reference numeral M1 denotes a parting line on the lens part side of the lamp case 61, and M2 denotes a parting line on the housing part side.

If the vehicle lamp device is manufactured as described above, the same effects as those of the manufacturing method described with reference to FIGS. 10 to 14 can be obtained. In addition, the assembling work of the lamp case 61 and the lamp component 71 can be achieved. And the number of manufacturing steps can be reduced, so that the working efficiency can be improved and the total manufacturing cost (product price) can be suppressed. When the housing molds 91 are closed as in this embodiment, the lamp 73 is closed.
If the vicinity of the boundary 76 between the main body 74 and the base 75 is sandwiched between the parisons P, there is no gap between the periphery of the base of the lamp 73 and the inner surface of the lamp component holding portion 64 of the housing 63. The light source 77 of the lamp 73 can be located near the inner surface 66 of the housing 63. Therefore, the light from the lamp 73 is
The light can be efficiently reflected by the inner surface 66, and the light distribution efficiency of the vehicle lamp device 60 can be increased.

Here, as in the two embodiments described with reference to FIGS. 10 to 18, a parison P having a substantially flat cross section or a substantially circular cross section is used, and the blowing nozzles 100 and 1 are used.
In the blow molding performed by disposing 06 in the parison P, the blowing nozzles 100 and 106 must be inserted from the opening of the parison P. At this time, in order to prevent molding defects and to improve the light distribution efficiency of the lamp device, the blowing nozzle 106 (100) is positioned at the center of the lens surface molding surface 83 of the blow mold 80 as shown in FIG. The angle θ between the tangent line N1 of 83o and the center line N2 of the optical axis (the straight line connecting the center 83o of the lens surface forming surface and the center 77o of the light source 77 of the lamp 73) is about 30 to 60 °. preferable. That is, when the angle θ is equal to or less than 30 °, the irradiation area of the light from the lamp 73 (the direct irradiation area to the lens surface 62a) becomes narrow, and a sufficient light distribution effect of the lamp device may not be obtained. is there. On the other hand, when the angle θ is equal to or greater than 60 °, when the blowing nozzle 106 (100) is sandwiched between the parisons P, the parison P
09 (103) may be blocked, and the parison P may not be formed into a desired shape.

In the blow molding, instead of the parison P, as shown in FIG.
A parison Q having a substantially U-shaped cross section and having the following configuration can also be used. In this case, the blowing nozzle 106 (100) and the lamp component 71 (or the projection member 102 for forming an opening).
Is the gap Q of the parison Q between the blow molds 110
Inserted from a. Therefore, the blowing nozzle 106
There is an advantage that the position of (100) and the lamp component 71 (or the projection forming member 102) with respect to the parison Q can be freely set. Further, as in the case of using the cylindrical parison, the blowing nozzle 106 (10
There is also an advantage that the angle of the blow mold 110 with respect to the lens surface molding surface 113 of 0), that is, the restriction on the shape of the lamp case can be reduced. In the figure, reference numeral 111 denotes a lens mold, and 115 denotes a housing mold.

The present invention is not limited to the above-described embodiment, but uses a silver paint on the inner or outer surface of the housing of the lamp case so that the light from the lamp of the lamp component is directed in the desired direction on the lens side. Coating and aluminum deposition,
The present invention can also be applied to the structure of a vehicle lamp device having an uneven surface that has been subjected to a brilliant treatment by silver plating or the like and a method of manufacturing the same.

[0045]

As shown and described above, in the vehicle lamp device according to the first aspect of the present invention, the parting line at the time of blow molding is formed so as to be substantially parallel to the lens surface. Since the line and the housing part-side parting line are formed at positions where the housing part is substantially divided into two, the length around the lens part between the opposing parting lines of the lens part-side parting line is the lens surface. , And the length of the circumference of one side of the housing section divided by the housing part-side parting line and the length of the circumference of the other side are substantially the same. Therefore, it is possible to prevent a thickness deviation from occurring in the housing portion and the lens portion during blow molding. In particular, since the thickness of the lens portion can be made uniform, it is possible to prevent the occurrence of light and dark in the irradiation light from the lens surface due to the thickness deviation of the lens portion as in the related art.

According to the method for manufacturing a vehicle lamp device according to the second aspect of the present invention, the vehicle lamp device according to the first aspect of the present invention can be easily manufactured. In addition,
By closing the blow mold while blowing compressed gas into the parison during blow molding, the parison adheres to the lens surface molding surface of the blow mold while pushing the air between the blow mold and the parison out of the mold. Can be done. As a result, it is possible to improve the accuracy of the molded product, particularly the accuracy of the lens surface, and it is possible to more reliably prevent light and dark from irradiating the light from the lens surface.

Further, as in the third aspect of the present invention, the protrusion for forming an opening is held in the forming part for the lamp part holding part of the housing part forming die and blow-molded. At this time, the lamp part is mounted at the position of the protrusion. 3. The method according to claim 2, wherein:
In addition to the effects of the invention, complicated post-processing such as forming an opening for mounting a lamp component in the housing portion by an ultrasonic cutter or the like after blow molding becomes unnecessary, and the number of manufacturing steps can be reduced.

Further, if the lamp part is held by the lamp part holding part forming part of the housing part forming die and the lamp part is protruded into the parison and blow-molded as in the invention of the fourth aspect, the third aspect is provided. In addition to the effects of the invention, the lamp case and the lamp component can be integrated during blow molding. Therefore, the assembling work of the lamp case and the lamp component can be omitted, that is, the number of manufacturing steps can be further reduced, so that the manufacturing work efficiency can be improved and the total manufacturing cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a vehicle lamp device according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG. 1;

FIG. 4 is a sectional view taken along the line CC of FIG. 3;

FIG. 5 is a cross-sectional view showing a parison arranged between blow molding dies when manufacturing the vehicle lamp device according to the present invention.

FIG. 6 is a sectional view taken along line DD of FIG. 5;

FIG. 7 is a sectional view showing the initial stage of closing the blow mold.

FIG. 8 is a cross-sectional view showing a state when the closing of the blow mold is completed.

FIG. 9 is a sectional view taken along the line EE of FIG. 8;

FIG. 10 is a cross-sectional view showing a parison arranged between blow molding dies when manufacturing a vehicle lamp device according to the present invention according to another embodiment.

11 is a view as seen from the direction of arrow F in FIG. 10;

FIG. 12 is a cross-sectional view showing the same state when the closing of the blow mold is completed.

FIG. 13 is a sectional view taken along line GG of FIG.

FIG. 14 is a cross-sectional view showing an opening forming projection member used in the embodiment.

FIG. 15 is a cross-sectional view showing a parison arranged between blow molding dies when a vehicle lamp device according to the present invention is manufactured according to still another embodiment.

FIG. 16 is a cross-sectional view showing the same state when the closing of the blow mold is completed.

FIG. 17 is a sectional view taken along line HH of FIG. 16;

FIG. 18 is a sectional view showing a main part of a blowing nozzle used in the embodiment.

FIG. 19 is a cross-sectional view showing a parison arranged between blow molding dies when a vehicle lamp device according to the present invention is manufactured according to still another embodiment.

FIG. 20 is a perspective view showing a conventional vehicle lamp device.

21 is a sectional view taken along the line II of FIG. 20.

FIG. 22 is a sectional view taken along line VV of FIG. 20;

[Explanation of symbols]

10:60 Vehicle lamp device 12:62 Lens portion 12a: 62a Lens surface 13:63 Housing portion 15:65 Lamp component mounting opening 21:71 Lamp component 22:72 Socket 23:73 Lamp 30: 80: 110 Blow molding Mold 31: 81: 111 Lens part molding die 32:82 Lens part molding part 33: 83: 113 Lens surface molding surface 35:85 Lens part side parting surface of lens part molding die 41: 91: 115 Housing part molding die 42:92 Molding part for housing part 43:93 Molding part for lamp part holding part 45:95 Lens part side parting surface of housing part molding die 46:96 Housing part parting surface of housing part molding die 102 For opening formation Projection member L: M Parting line of vehicle lamp device L1: M1 Lens side Computing line L2: M2 housing side parting line P: Q parison

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Hiroshi Shibata Inouac Corporation Sakurai Plant, 8-1, Tocho, Fujii-cho, Anjo-shi, Aichi Prefecture

Claims (4)

[Claims] In a vehicle lamp device in which a lens portion and a housing portion are integrally blow-molded, a lens part side part in which a parting line at the time of blow molding is formed substantially parallel to a lens surface at a front end of the lens portion. And the
A lamp unit for a vehicle, comprising: a housing part side parting line formed at a position where the housing part is substantially divided into two through a lamp part holding part of the housing part. 2. A method for manufacturing a vehicular lamp device in which a parison is disposed between blow molding dies and closed to form a lens part and a housing part in an integral blow molding method, wherein the blow molding dies are substantially the same as the lens surface molding surface. A housing part forming die and a lens part forming die divided by a parallel lens part parting surface, and the housing part forming die is substantially two-dimensional at a housing part side parting surface passing through a lamp part holding part forming part. A method for manufacturing a lamp device for a vehicle, comprising: separating a part between a lens part side surface and a housing part side part; 3. A lamp component mounting part according to claim 2, wherein the projection for forming an opening is held in a molding part for the lamp part holding part of the housing part forming die and blow molded, and a lamp part is mounted at the position of the projection for forming the opening. A method for manufacturing a vehicle lamp device, comprising forming an opening for use in a vehicle. 4. The method according to claim 2, wherein the lamp is mounted on the socket by holding the lamp component mounted on the lamp component holding portion forming portion of the housing portion forming die, and the lamp portion is projected into the parison and blow-molded. A method for manufacturing a vehicle lamp device.